JWT Decoder

Paste a token. See header, payload, and expiration.

Your files never leave your device

How it works

Paste any JWT (the header.payload.signature string). We split it, base64-decode each part, and pretty-print the JSON. The expiration timestamp is checked so you can tell at a glance if the token is still valid. Decoding runs in your browser — the token never leaves your device.

This site was built in one night using AI.

Every tool here runs on somewhere.tech — the backend for developers who ship with AI coding agents.

30-second build video — coming soon.